No-test or busy verification in a private branch exchange telephone system



Nov. 12, 1968 wm ET AL 3410,960

No-TEsT 0R BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM Filed March 9, 1965 109 Sheets-Sheet 1 U) 5 .Q T a 0- E -E E u CD Q 03 x i Lu Lu 2 2 E Z 2 3 3 T 3 E g k E J 5 E B E 3 $252-$351: INVENTORS dd HJWALSH (a- WMMQXT ATTOQ/VEY Nov. 12, 1968 E. L. ERWIN ET AL 3410,960

NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM Filed March 9, 1965 109 Sheets-Sheet 2'3 Nov. 12, 1968 E. 1.. E RWIN ET L NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM 109 Sheets-Sheet 4 Fi led March 9, 1965 gmimmq v mw ENTSEN 33$? g m JEN 9% -35 Nov. 12, 1968 E. L. ERWIN ET AL NO-TEST on BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM Filed March 9, 1965 109 Sheets- Sheet 6 flaw 2 P w :2: O. mDm @vvlm gm 653E; I 652: C v 58 .v v NI |1 E azag mg @535 @w w mm nn 1 m am g A In m m mwcmfim IQ It m u a m -J T P 0 v 84 m l m EGEE E 05 8: 9 1 N ME- 6Q 89% 8259mm ,E m 8Q Aevqzs v mom owwo .Ew 29.2.5 MES w OH Nov. 12, 1968 wm ET AL NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM 109 Sheets-Sheet 10 Filed March 9, 1965 E. L. ERWIN ET AL NO-TEST OR BUSY BRANCH EXCHANGE TELEPHONE SYSTEM 109 Sheets-Sheet 11 csTmuzom 04ml:

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2 :E buxom ccTmuIom 2 cTmuIom 32 Filed March 9, 1965 109 Sheets-Sheet 1' Hill! IIHII Hllll E. L. ERWIN ETAL NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM HHH E... 2... 2 8 E HHH 2 E z MMM I826 859 B I226 818.. fimmmmm :2: :2: E5 E5 1.... :2: 1.... :I: m .2... .2... 2.... :z: :z: E5 55 E IHH 2% E 2% E E WMW 2 10.226 QQIQQ 0 Hum 19:26 o0Iow Hllll l lllll Nov. 12, 1968 Filed March 9, 1965 Nov. 12, 1968 2.1.. ERWIN ET AL NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM 109 Sheets-Sheet 15 Filed March 9, 1965 3w... S S 9 S w W M M W W 9 W U 9 aavia. x 52 2.20. 2.2-9.2 52 922 56 23. 5.0 9.2.. P b b T T 5.2-282 1 55-85 5.2-85 225-8%. 1 822 8%. 55 8%. 5.28228. 1 152-0822. 1 526822 i 52-8228. 3.2-2.822. 2.2-2.822. 52-8222. 1 6.2-0822. 1 62-0823. 1 T 8.3828. 5.382%. 5.1.822. 5..-8 m.22 r 5.5822. 1 1 52 8022. 1 2 2 6E 52-3228. 8.2-2.223. 525822.

Nov. 12, 1968 E. 1.. ERWIN ETAL NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM I Filed March 9, 1965 109 Sheets-Sheet 14 2% 8m mo 5o; bu (.23: 222: 82: E 75E 8 "6 m2: 8 m2: 8 8 J J w w g m g m 5%; E E E E E P E E 8 Q E 8 i Q .t S E (lllll llllll Illlll QSTQQION Illlll llllll IIIIII IlIII'I llllll illlll illlll Illlll qwcmTourom Nov. 12, 1968 E. L. ERWIN ET AL 3410,960

NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM 109 Sheets-Sheet 15 Filed March 9, 1965 HE E Q .i Q E FL 3 6E mmm BK @035.

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Nov. 12, 1968 E. 1.. ERWIN ET AL NO-TEST OR BUSY VERIFICATION IN A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM 109 Sheets-Sheet 20 Filed March 9, 1965 @5318 r 6822018 I I m E,

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